I ride with one. Almost 4 years ago I got seriously hurt at the Lake Geneva Snocross race. Yes I had one on, but it was a freak accident and I lost 60% of my pancreas and all of my spleen. It was suppose to be my last race of my 8 year career (not much of a shining career, but I was in to it big time) As I was laying there at the emergency center in a daze, all I could see was my preganant wife and 3 year old son. To make a long story short, I recovered and only have minor health problems from it. We were blessed with another healthy son. Both my sons have taken up ridin sleds and they both have chest protectors. As for me, I couldn't give up riding, doctors said to just protect my internals...so puttin on my tekvest is just like puttin on gloves and a helmet. I guess what I am saying is you just never know when something major is going to happen.